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-rw-r--r--roms/u-boot-sam460ex/common/env_nand.c376
1 files changed, 376 insertions, 0 deletions
diff --git a/roms/u-boot-sam460ex/common/env_nand.c b/roms/u-boot-sam460ex/common/env_nand.c
new file mode 100644
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+++ b/roms/u-boot-sam460ex/common/env_nand.c
@@ -0,0 +1,376 @@
+/*
+ * (C) Copyright 2008
+ * Stuart Wood, Lab X Technologies <stuart.wood@labxtechnologies.com>
+ *
+ * (C) Copyright 2004
+ * Jian Zhang, Texas Instruments, jzhang@ti.com.
+
+ * (C) Copyright 2000-2006
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.de>
+
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#include <malloc.h>
+#include <nand.h>
+
+#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_NAND)
+#define CMD_SAVEENV
+#elif defined(CONFIG_ENV_OFFSET_REDUND)
+#error Cannot use CONFIG_ENV_OFFSET_REDUND without CONFIG_CMD_SAVEENV & CONFIG_CMD_NAND
+#endif
+
+#if defined(CONFIG_ENV_SIZE_REDUND) && (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
+#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
+#endif
+
+#ifdef CONFIG_INFERNO
+#error CONFIG_INFERNO not supported yet
+#endif
+
+#ifndef CONFIG_ENV_RANGE
+#define CONFIG_ENV_RANGE CONFIG_ENV_SIZE
+#endif
+
+/* references to names in env_common.c */
+extern uchar default_environment[];
+
+char * env_name_spec = "NAND";
+
+
+#if defined(ENV_IS_EMBEDDED)
+extern uchar environment[];
+env_t *env_ptr = (env_t *)(&environment[0]);
+#elif defined(CONFIG_NAND_ENV_DST)
+env_t *env_ptr = (env_t *)CONFIG_NAND_ENV_DST;
+#else /* ! ENV_IS_EMBEDDED */
+env_t *env_ptr = 0;
+#endif /* ENV_IS_EMBEDDED */
+
+
+/* local functions */
+#if !defined(ENV_IS_EMBEDDED)
+static void use_default(void);
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+uchar env_get_char_spec (int index)
+{
+ return ( *((uchar *)(gd->env_addr + index)) );
+}
+
+
+/* this is called before nand_init()
+ * so we can't read Nand to validate env data.
+ * Mark it OK for now. env_relocate() in env_common.c
+ * will call our relocate function which does the real
+ * validation.
+ *
+ * When using a NAND boot image (like sequoia_nand), the environment
+ * can be embedded or attached to the U-Boot image in NAND flash. This way
+ * the SPL loads not only the U-Boot image from NAND but also the
+ * environment.
+ */
+int env_init(void)
+{
+#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_NAND_ENV_DST)
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *tmp_env1;
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ env_t *tmp_env2;
+
+ tmp_env2 = (env_t *)((ulong)env_ptr + CONFIG_ENV_SIZE);
+ crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
+#endif
+
+ tmp_env1 = env_ptr;
+
+ crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
+
+ if (!crc1_ok && !crc2_ok) {
+ gd->env_addr = 0;
+ gd->env_valid = 0;
+
+ return 0;
+ } else if (crc1_ok && !crc2_ok) {
+ gd->env_valid = 1;
+ }
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ else if (!crc1_ok && crc2_ok) {
+ gd->env_valid = 2;
+ } else {
+ /* both ok - check serial */
+ if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if(tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if(tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+ }
+
+ if (gd->env_valid == 2)
+ env_ptr = tmp_env2;
+ else
+#endif
+ if (gd->env_valid == 1)
+ env_ptr = tmp_env1;
+
+ gd->env_addr = (ulong)env_ptr->data;
+
+#else /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 1;
+#endif /* ENV_IS_EMBEDDED || CONFIG_NAND_ENV_DST */
+
+ return (0);
+}
+
+#ifdef CMD_SAVEENV
+/*
+ * The legacy NAND code saved the environment in the first NAND device i.e.,
+ * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
+ */
+int writeenv(size_t offset, u_char *buf)
+{
+ size_t end = offset + CONFIG_ENV_RANGE;
+ size_t amount_saved = 0;
+ size_t blocksize, len;
+
+ u_char *char_ptr;
+
+ blocksize = nand_info[0].erasesize;
+ len = min(blocksize, CONFIG_ENV_SIZE);
+
+ while (amount_saved < CONFIG_ENV_SIZE && offset < end) {
+ if (nand_block_isbad(&nand_info[0], offset)) {
+ offset += blocksize;
+ } else {
+ char_ptr = &buf[amount_saved];
+ if (nand_write(&nand_info[0], offset, &len,
+ char_ptr))
+ return 1;
+ offset += blocksize;
+ amount_saved += len;
+ }
+ }
+ if (amount_saved != CONFIG_ENV_SIZE)
+ return 1;
+
+ return 0;
+}
+#ifdef CONFIG_ENV_OFFSET_REDUND
+int saveenv(void)
+{
+ int ret = 0;
+ nand_erase_options_t nand_erase_options;
+
+ env_ptr->flags++;
+
+ nand_erase_options.length = CONFIG_ENV_RANGE;
+ nand_erase_options.quiet = 0;
+ nand_erase_options.jffs2 = 0;
+ nand_erase_options.scrub = 0;
+
+ if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
+ return 1;
+ if(gd->env_valid == 1) {
+ puts ("Erasing redundant Nand...\n");
+ nand_erase_options.offset = CONFIG_ENV_OFFSET_REDUND;
+ if (nand_erase_opts(&nand_info[0], &nand_erase_options))
+ return 1;
+
+ puts ("Writing to redundant Nand... ");
+ ret = writeenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) env_ptr);
+ } else {
+ puts ("Erasing Nand...\n");
+ nand_erase_options.offset = CONFIG_ENV_OFFSET;
+ if (nand_erase_opts(&nand_info[0], &nand_erase_options))
+ return 1;
+
+ puts ("Writing to Nand... ");
+ ret = writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
+ }
+ if (ret) {
+ puts("FAILED!\n");
+ return 1;
+ }
+
+ puts ("done\n");
+ gd->env_valid = (gd->env_valid == 2 ? 1 : 2);
+ return ret;
+}
+#else /* ! CONFIG_ENV_OFFSET_REDUND */
+int saveenv(void)
+{
+ int ret = 0;
+ nand_erase_options_t nand_erase_options;
+
+ nand_erase_options.length = CONFIG_ENV_RANGE;
+ nand_erase_options.quiet = 0;
+ nand_erase_options.jffs2 = 0;
+ nand_erase_options.scrub = 0;
+ nand_erase_options.offset = CONFIG_ENV_OFFSET;
+
+ if (CONFIG_ENV_RANGE < CONFIG_ENV_SIZE)
+ return 1;
+ puts ("Erasing Nand...\n");
+ if (nand_erase_opts(&nand_info[0], &nand_erase_options))
+ return 1;
+
+ puts ("Writing to Nand... ");
+ if (writeenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr)) {
+ puts("FAILED!\n");
+ return 1;
+ }
+
+ puts ("done\n");
+ return ret;
+}
+#endif /* CONFIG_ENV_OFFSET_REDUND */
+#endif /* CMD_SAVEENV */
+
+int readenv (size_t offset, u_char * buf)
+{
+ size_t end = offset + CONFIG_ENV_RANGE;
+ size_t amount_loaded = 0;
+ size_t blocksize, len;
+
+ u_char *char_ptr;
+
+ blocksize = nand_info[0].erasesize;
+ len = min(blocksize, CONFIG_ENV_SIZE);
+
+ while (amount_loaded < CONFIG_ENV_SIZE && offset < end) {
+ if (nand_block_isbad(&nand_info[0], offset)) {
+ offset += blocksize;
+ } else {
+ char_ptr = &buf[amount_loaded];
+ if (nand_read(&nand_info[0], offset, &len, char_ptr))
+ return 1;
+ offset += blocksize;
+ amount_loaded += len;
+ }
+ }
+ if (amount_loaded != CONFIG_ENV_SIZE)
+ return 1;
+
+ return 0;
+}
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+void env_relocate_spec (void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *tmp_env1, *tmp_env2;
+
+ tmp_env1 = (env_t *) malloc(CONFIG_ENV_SIZE);
+ tmp_env2 = (env_t *) malloc(CONFIG_ENV_SIZE);
+
+ if ((tmp_env1 == NULL) || (tmp_env2 == NULL)) {
+ puts("Can't allocate buffers for environment\n");
+ free (tmp_env1);
+ free (tmp_env2);
+ return use_default();
+ }
+
+ if (readenv(CONFIG_ENV_OFFSET, (u_char *) tmp_env1))
+ puts("No Valid Environment Area Found\n");
+ if (readenv(CONFIG_ENV_OFFSET_REDUND, (u_char *) tmp_env2))
+ puts("No Valid Reundant Environment Area Found\n");
+
+ crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
+ crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
+
+ if(!crc1_ok && !crc2_ok) {
+ free(tmp_env1);
+ free(tmp_env2);
+ return use_default();
+ } else if(crc1_ok && !crc2_ok)
+ gd->env_valid = 1;
+ else if(!crc1_ok && crc2_ok)
+ gd->env_valid = 2;
+ else {
+ /* both ok - check serial */
+ if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if(tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if(tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+
+ }
+
+ free(env_ptr);
+ if(gd->env_valid == 1) {
+ env_ptr = tmp_env1;
+ free(tmp_env2);
+ } else {
+ env_ptr = tmp_env2;
+ free(tmp_env1);
+ }
+
+#endif /* ! ENV_IS_EMBEDDED */
+}
+#else /* ! CONFIG_ENV_OFFSET_REDUND */
+/*
+ * The legacy NAND code saved the environment in the first NAND device i.e.,
+ * nand_dev_desc + 0. This is also the behaviour using the new NAND code.
+ */
+void env_relocate_spec (void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+ int ret;
+
+ ret = readenv(CONFIG_ENV_OFFSET, (u_char *) env_ptr);
+ if (ret)
+ return use_default();
+
+ if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc)
+ return use_default();
+#endif /* ! ENV_IS_EMBEDDED */
+}
+#endif /* CONFIG_ENV_OFFSET_REDUND */
+
+#if !defined(ENV_IS_EMBEDDED)
+static void use_default()
+{
+ puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
+ set_default_env();
+}
+#endif